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Old 26th May 2018, 07:11   #47  |  Link
foxyshadis
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Join Date: Nov 2004
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Quote:
Originally Posted by benwaggoner View Post
MPEG-2 -> H.264 -> HEVC were about 2x more complex per pixel, for about 2x better efficiency. Generally more complexity or lower efficiency gains don't really move the market (see MPEG-4 part 2, Theora, VP6-9)
I really believe that it's been closer to 1.4x quality for 2x complexity, at some "midrange" (when you insert ASP between MPEG-2 and AVC). Each generation gets 2x or more better at the low-end, and barely budges the needle at the top-end, but some magical middling rate that's barely objectionable is where codecs are really put to the test. HEVC easily qualifies for "not worth the hassle" except for its day-1 promise of built-in hardware-accelerated 10-bit and HDR; except at the absolute lowest bitrates it never comes close to living up to its half-rate promise. If AVC RExt had found its way into hardware, HEVC's use case would have been squeezed to nothing, considering the ongoing licensing spats, while the world again waited for the next world heavyweight champion to appear.

A quadratic increase in complexity for a linear increase in efficiency sucks, but that's what we have the remnants of Moore's law for.
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